mdsolar writes: "High levels of radioactive cesium were detected in straw fed to cattle at a farm in Minamisoma, Fukushima Prefecture, local officials said Monday, fueling suspicion it was the source of the radioactive contamination found in the meat of cows shipped from there.

The straw, saturated with an average of 75,000 becquerels of radioactive cesium per kilogram, around 56 times the allowable limit, was stored in an unroofed area of the farm when a series of explosions occurred at the Fukushima Daiichi nuclear power plant following the March 11 earthquake and tsunami, according to prefectural officials."